SM802108

SM802108 ClockWorks™ 10GbE & GbE (156.25MHz, 125MHz) Ultra-Low Jitter, LVPECL Frequency Synthesizer General Description The SM802108 is a member of the ClockWorks™ family of devices from Micrel and provides an extremely low-noise timing solution for GbE and 10GbE Ethernet clock signals. It is based upon a unique patented RotaryWave® architecture that provides very low phase noise. The device operates from a 3.3V or 2.5V power supply and synthesizes two LVPECL output clocks at 156.25MHz and another two at 125MHz. The SM802108 accepts a 25 MHz crystal or LVCMOS reference clock. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features Generates two LVPECL clock outputs at 156.25MHz and two LVPECL clock outputs at 125MHz 2.5V or 3.3V operating range Typical phase jitter @ 156.25MHz (1.875MHz to 20MHz): 110fs (typical) at 3.3V Industrial temperature range Green, RoHS, and PFOS compliant Available in 24-pin 4mm × 4mm QFN package Applications 10Gigabit Ethernet Gigabit Ethernet ___________________________________________________________________________________________________________ Block Diagram www.DataSheet4U.com ClockWorks is a trademark of Micrel, Inc RotaryWave is a registered trademark of Multigig, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com January 2011 M9999-012111-A hbwhelp@micrel.com or (408) 955-1690 Micrel, ...